제출 #515817

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
515817		LunaMeme	Knapsack (NOI18_knapsack)	C++14	12 / 100	1 ms	204 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> ii;
typedef vector<pair<int, int>> vii;
typedef vector<int> vi;
typedef long long ll;
#define PB push_back
#define MP make_pair
#define FOR(i, x, y) for (int i = x; i < y ; i ++)

int main(){
    int s, n;
    cin >> s >> n;
    vector<pair<ll, ll>> weights[s + 1];
    FOR(i, 0, n){
        ll v, w, k;
        cin >> v >> w >> k;
        weights[w].PB(MP(v, k));
    }
    FOR(i, 0, s){
        sort(weights[i].rbegin(), weights[i].rend());
    }
    ll dp[s + 1];
    FOR(i, 1, s + 1){
        dp[i] = -1e9;
    }
    dp[0] = 0;
    ll ans = 0;
        FOR(j, 1, s + 1){
            int indx = 0;
            ll prev = 0;
            FOR(cnt, 1, s/j + 1){
                for(int i = s; i >= 1; i --){
                    //cout << dp[s] << '\n';
                    if (j > i  || indx >= (int)weights[j].size()){
                        break;
                    }
                    if (cnt - prev > weights[j][indx].second){
                        prev += weights[j][indx].second;
                        indx ++;
                    }
                    if (indx >= (int)weights[j].size()){
                        break;
                    }
                    dp[i] = max(dp[i], dp[i - j] + weights[j][indx].first);
            }
        }
    }
    FOR(i, 0, s + 1){
        //cout << i << " : " << dp[i] << '\n';
        ans = max(ans, dp[i]);
    }
    cout << ans << '\n';

}

• Subtask 1: 12 / 12
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 24
• Subtask 5: 0 / 27